/************************************************************************
 * Copyright (c) 1990, 1993
 *    The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Chris Torek.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 ************************************************************************/


#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)fwalk.c    8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
//#include <sys/cdefs.h>
//__FBSDID("$FreeBSD$");

//#include <sys/types.h>
#include "stdio.h"
#include "local.h"
#include "glue.h"

int
_fwalk(int (*function)(FILE *))
{
    FILE *fp;
    int n, ret;
    struct glue *g;

    ret = 0;
    /*
     * It should be safe to walk the list without locking it;
     * new nodes are only added to the end and none are ever
     * removed.
     *
     * Avoid locking this list while walking it or else you will
     * introduce a potential deadlock in [at least] refill.c.
     */
    for (g = &__sglue; g != NULL; g = g->next)
        for (fp = g->iobs, n = g->niobs; --n >= 0; fp++) /*lint !e441*/
            if ((fp->_flags != 0) && ((fp->_flags & __SIGN) == 0))
                ret |= (*function)(fp);
    return (ret);
}
